[wxsig] Connecting T-238+, X1W-1, X1W-2 and AAG

I'm in the process of extending my initial weather staton that consisted
of a T-238+ and an AAG weather station by adding the X1W-1 and X1W-2 and
am having problems getting the system to work when the components are
hooked together. Here's my current situation:
1. My T238+ and AAG WX station work well together: I've had the
station up and running - data have been seen on findu.
2. I have completed assembly of the X1W-1 and it checks out OK using
tstfind.
3. I have attached the AAG WX station to thw X1W-1 and the sensors are
found when tested using tstfind and other utilities.
4. I have double checked the 1 wire cables I have made to ensure
straight through and have good continuity
When I connect the T238+, X1W-1 and AAG together I either get bus shorts
to ground, or the T238+ doesn't start when it is plugged in depending on
configuration. I have looked through the wxsig archives and seen
references to the need to cut some traces on the AAG unit in order to
make it all work, but haven't found clear direction on which traces to
actually cut.
In trying to figure this out I've looked at the schematics of all 4
units and have come up with the following table that describe the
connections assigned to the various pins on RJ11 jacks. I've put
together 2 tables shown below that show the pin outs on the 1 wire bus
for the four components used in the system. One table shows the
situation where P17 and JMP3 jumpers are placed across P and 2, and the
other situation where the jumpers areplaced across P and 1.
Situation 1
Pin Number**
Device**
*6 Pin RJ 11*
*4 Pin RJ 11*
*T-238+*
*X1W-1*
*X1W-2*
*AAG*
1
2
1
gnd
+5V
+5V
Vcc
3
2
Bus
Bus
Bus
Bus
4
3
gnd
gnd
gnd
gnd
5
4
+5V
gnd
6
X1W-1 P17 jumper connect pins P and 2
X1W-2 JMP3 jumper connect pins P and 2
Situation 2
Pin Number
Device
*6 Pin RJ 11*
*4 Pin RJ 11*
*T-238+*
*X1W-1*
*X1W-2*
*AAG*
1
2
1
gnd
Vcc
3
2
Bus
Bus
Bus
Bus
4
3
gnd
gnd
gnd
gnd
5
4
+5V
+5V
+5V
gnd
6
X1W-1 P17 jumper connect pins P and 1
X1W-2 P JMP3 jumper connect pins P and 1
It's dangerous for a guy like me to be reading schematics because if
there ever was an amateur looking at this stuff, it's me... So I'd
appreciate those of you who really know something about this to please
check my work. I used the schematics on the TAPR website for the T238+
and X1W units, and a schematic found on the AAG website for the pin-outs
on the AAG WX station (aag schematic:
http://www.aagelectronica.com/aag/en-us/p_1.html) .
<http://www.aagelectronica.com/aag/en-us/p_1.html>
Assuming that these tables are correct, then it seems to me the best way
for me to connect all four units together is to do the following:
1. Place jumpers on P17 and JMP3 across pins P and 1 as this will make
the bus wiring for the T238+ and X1W units the same.
2. Connect the T238 to the X1W-1 using a straight through 4 lead cable.
3. Connect the X1W-2 to the X1W-1 using a straight through 4 lead cable.
4. Connect the AAG WX station to the X1W-2 using a cable that crosses
leads 1 and 4 so that +5 V from pin 4 of the X1W-2 will be directed to
pin 1 of the AAG wx station.
Does this make sense? If not, does anyone have an alternative
recommendation?
Thanks for the help.
Regards,
Leon
NT8B